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Thread: 407c??

  1. #1
    Join Date
    Apr 2017
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    407c??

    Green tech guy.
    Supply company telling me you can add this on top of r-22, but most techs say it's a retrofit, any suggestions?


    Sent from my iPhone using Tapatalk

  2. #2
    Join Date
    Apr 2005
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    Australia : Queensland
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    Can be added with no TXV adjustment.

    Here is another post that looks into this further.

    http://hvac-talk.com/vbb/showthread....g-407C-and-R22
    The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman.

  3. Likes Jettinvr6sc, weezer81 liked this post.
  4. #3
    Join Date
    Nov 2006
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    Athens, Ohio
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    Positively not! You seem to be saying that you will mix the refrigerants.
    The old refrigerant must be recovered and replaced with the new refrigerant.
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